Scheme - Re: HOF implementation of "until"

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Re: HOF implementation of "until"

Ulrich Hobelmann

2005-11-03, 7:01 pm

Andre wrote:
> A macro can be used to hide this detail, and can be justified by the
> same arguments used for any other kind of abstraction.
>
> These include:
>
> - Modularity: being able to change the implementation
> from e.g., thunks to monads without having to change all the use sites.
> - Optimization: The macro might construct thunks behind the
> scenes, but does not have to. A syntax that is agnostic with
> respect to this detail is arguably better than a HOF that isn't,
> for a looping construct where performance might be important.

Good example. I much prefer Lisp's
(dolist (x '(1 2 3))
(format t "~d~%" x))

over Scheme's
(for-each (lambda (x) (display x) (newline))
'(1 2 3))

--
The road to hell is paved with good intentions.

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